{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,27]],"date-time":"2026-01-27T15:19:45Z","timestamp":1769527185911,"version":"3.49.0"},"reference-count":35,"publisher":"SAGE Publications","license":[{"start":{"date-parts":[[2018,1,1]],"date-time":"2018-01-01T00:00:00Z","timestamp":1514764800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Cephalalgia Reports"],"published-print":{"date-parts":[[2018,1,1]]},"abstract":"<jats:p> Nummular headache (NH) is an unusual disorder attributed to a dysfunction of the epicranial nerves. We report a new series of cases, highlighting some clinical features, the association with other headaches, and the therapeutic response. Data of patients with NH, fulfilling ICHD-3 criteria, observed in a Headache Outpatient clinic during 5 years, were retrieved from records. Response to onabotulinumtoxinA was recorded prospectively and evaluated with a Headache Impact Test (HIT). Twenty-four patients, aged 53.8 (\u00b114.6) years at diagnosis, 13 women, had definitive ( N = 21) or probable ( N = 3) NH for an average of 2.4 years. Headache was consistently localized, more frequently extratrigeminal ( N = 15) and parietal, and confined to the scalp. Pain was unremitting since onset in 58.3% of mild-to-moderate severity often with superimposed paroxysms (66.7%) and local allodynia (70.8%). In five cases, there was a possible precipitant. Thirteen patients reported other headaches, preceding NH by 8.2 years. In eight persistent cases, there was a significant improvement on HIT, after onabotulinumtoxinA. Despite its persistence, NH may go unrecognized for years. It often follows other headache types and has some tropism for hair-covered regions of the scalp. OnabotulinumtoxinA seems effective in persistent cases. <\/jats:p>","DOI":"10.1177\/2515816318802771","type":"journal-article","created":{"date-parts":[[2018,10,5]],"date-time":"2018-10-05T10:36:57Z","timestamp":1538735817000},"update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":11,"title":["Nummular headache"],"prefix":"10.1177","volume":"1","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9611-7400","authenticated-orcid":false,"given":"Isabel Pav\u00e3o","family":"Martins","sequence":"first","affiliation":[{"name":"Headache Outpatient Clinic, Department of Neurology, Hospital de Santa Maria, CHLN Lisbon, Lisbon, Portugal"},{"name":"Centro de Estudos Egas Moniz, Faculdade de Medicina, Universidade de Lisboa, Lisboa, Portugal"}]},{"given":"Luis","family":"Abreu","sequence":"additional","affiliation":[{"name":"Headache Outpatient Clinic, Department of Neurology, Hospital de Santa Maria, CHLN Lisbon, Lisbon, Portugal"},{"name":"Centro de Estudos Egas Moniz, Faculdade de Medicina, Universidade de Lisboa, Lisboa, 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